call

This section is a work in progress.

Examples:

• bitcoin
• composite_queries
• cross_canister_calls
• cycles
• ethereum_json_rpc
• func_types
• generators
• ledger_canister
• management_canister
• outgoing_http_requests
• rejections
• timers
• whoami

from kybra import (
    Async,
    CallResult,
    match,
    nat64,
    Principal,
    Service,
    service_update,
    update,
    Variant,
)


class TokenCanister(Service):
    @service_update
    def transfer(self, to: Principal, amount: nat64) -> nat64:
        ...


token_canister = TokenCanister(Principal.from_str("r7inp-6aaaa-aaaaa-aaabq-cai"))


class PayoutResult(Variant, total=False):
    Ok: nat64
    Err: str


@update
def payout(to: Principal, amount: nat64) -> Async[PayoutResult]:
    result: CallResult[nat64] = yield token_canister.transfer(to, amount)

    return match(result, {"Ok": lambda ok: {"Ok": ok}, "Err": lambda err: {"Err": err}})